105432321 has 16 divisors (see below), whose sum is σ = 142369920. Its totient is φ = 69396480.

The previous prime is 105432247. The next prime is 105432329. The reversal of 105432321 is 123234501.

It is not a de Polignac number, because 105432321 - 2¹⁹ = 104908033 is a prime.

It is a super-2 number, since 2×105432321² = 22231948622894082, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (105432329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164161 + ... + 164801.

It is an arithmetic number, because the mean of its divisors is an integer number (8898120).

Almost surely, 2^105432321 is an apocalyptic number.

It is an amenable number.

105432321 is a deficient number, since it is larger than the sum of its proper divisors (36937599).

105432321 is a wasteful number, since it uses less digits than its factorization.

105432321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 105432321 is about 10268.0242013739. The cubic root of 105432321 is about 472.4159902151.

Adding to 105432321 its reverse (123234501), we get a palindrome (228666822).

The spelling of 105432321 in words is "one hundred five million, four hundred thirty-two thousand, three hundred twenty-one".